Necati SAMSUN, Ferhat KALAYCI, Osman SAMSUN

Türkiye’nin Sinop Bölgesi’ndeki (Karadeniz) Kalkan (Scophthalmus maeoticus Pallas, 1811) Balıklarının Boy, Ağırlık ve Cinsiyet Dağılımının Mevsimsel Değişimi

Sinop bölgesinde kalkan solungaç a¤lar›yla avlanan kalkan bal›klar›n›n, boy, a¤›rl›k ve cinsiyet da¤›l›m› mevsimlere göre incelenmifltir. Erkek ve difli kalkan bal›klar›n›n boylar› 23,9-69 cm ve 31,8-81 cm aras›nda de¤iflmifltir. Ortalama toplam boy ve a¤›rl›klar difli; 50,37 ± 0,42 cm, 2483,2 ± 74,7 g, erkek 45,93 ± 0,26 cm, 1711,2 ± 31,2 g ve tüm bireyler için 47,79 ± 0,24cm, 2034,6 ± 38,5 g olarak belirlendi. Kalkan bal›klar›n›n hem boy hem de a¤›rl›k de¤erlerinde mevsimlere göre farklar önemli bulundu. En yüksek ortalama boy ve a¤›rl›k de¤erleri 49,56 ± 0,35 cm ve 2286,5 ± 59,6 g olarak ilkbahardayd›. ‹lkbahar ile di¤er sezonlar aras›nda boy frekans da¤›l›m› aç›s›ndan önemli fark vard› (P < 0,001). ‹lkbaharda kalkan bal›¤›n›n cinsiyet oran› farkl› bulundu. Uzunluk a¤›rl›k iliflkisi W = 0,0074 L3.22 olarak hesapland›.

Anahtar Kelimeler:

Kalkan, Scophthalmus maeoticus, uzunluk, ağırlık, cinsiyet oranı, mevsimsel de¤iflim

Seasonal Variation in Length, Weight, and Sex Distribution of Turbot (Scophthalmus maeoticus Pallas, 1811) in the Sinop Region (Black Sea) of Turkey

The length, weight and sex distribution of turbot caught by bottom turbot gill nets were investigated in relation with seasons in the Sinop region. The size ranges were 23.9-69 cm and 31.8-81 cm for male and female turbot, respectively. Mean total length and weight were 50.37 ± 0.42 cm and 2483.2 ± 74.7 g for females, 45.93 ± 0.26 cm and 1711.2 ± 31.2 g for males, and 47.79 ± 0.24 cm and 2034.6 ± 38.5 g for all individuals. Significant differences were found both in length and weight values of turbot between seasons. The highest mean length and weight values were 49.56 ± 0.35 cm and 2286.5 ± 59.6 g in the spring, respectively. The length frequencies of turbot differed significantly between spring and other seasons (P < 0.001). Significant differences were found for sex ratios of turbot in spring. The length-weight relationship was estimated as W = 0.0074 L3.22.

Keywords:

Turbot, Scophthalmus maeoticus, length, weight, sex ratio, seasonal variation,

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